# STC SA2839WE-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: Installation of Ground Proximity Warning System with cockpit annunciations deactivated and warning signals connected to digital recorder.  Prime purpose of this STC is to obtain developmental data on the performance of the GPWS computer.
- Applied: April 29, 1975
- Status date: November 30, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/c8/24/c824eb1913e6c199e9a73c52bfbd14686c5fa0348dd0c8553d91f8e865d0ae23
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3B18D43CD5B5CCE78625799700521D52.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2839WE-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company DC-8-61 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 4b of the Civil Air Regulations.

Original Product Type Certificate Number : 4A25 Make: Boeing Model: DC-8-61, S/N 46066 only Description of Type Design Change : Installation of Ground Proximity Warning System with cockpit annunciations deactivated and warning si gnals connected to digital recorder. Prime purpose of this STC is to obtain developmental data on the performance of the GPWS computer.

Limitations and Conditions : Cockpit GPWS annunciations shall be de activated. This STC requires prior accomplishment of STC No. SA2827WE-D and is applicable to the airplane S/N 46066 only.

Date of application : April 29, 1975

Date of issuance : June 5, 1975

Date reissued : November 30, 2011

( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office ( Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Number and street)

(City, State, and ZIP Code)

from (Name of grantor) (Print or type)

(Address of grantor) (Number and street)

(City, State, and ZIP Code)

Signature of grantor (In ink):

U.S. GPO 1987-763-28

## Every issue (1)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c8/24/c824eb1913e6c199e9a73c52bfbd14686c5fa0348dd0c8553d91f8e865d0ae23)

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